PMID- 31091745 OWN - NLM STAT- MEDLINE DCOM- 20191113 LR - 20231012 IS - 1424-8220 (Electronic) IS - 1424-8220 (Linking) VI - 19 IP - 10 DP - 2019 May 14 TI - Self-Assembly of Functional Nucleic Acid-Based Colorimetric Competition Assay for the Detection of Immunoglobulin E. LID - 10.3390/s19102224 [doi] LID - 2224 AB - In this work, we have developed a simple and rapid colorimetric assay for the detection of immunoglobulin E (IgE) using functional nucleic acids (FNAs) and a solid-phase competition enzyme-linked immunosorbent assay (ELISA). The FNAs including aptamer of recombinant IgE, G-quadruplex and its complementary fragments were immobilized on 96-well microplates to achieve recognition and detection of IgE in biological samples. The G-quadruplex DNAzyme catalyzed 2,2'-Azino-bis (3-ethylbenzothiazoline-6-sulfonic acid (ABTS)-hemin-H(2)O(2) system was used to improve the sensitivity of colorimetric assay. In the presence of IgE, the hairpin structure and G-quadruplex would be destroyed, resulting in the inactivation of DNAzyme and subsequent reduction of its absorbance. This cost-effective approach detected IgE in the linear range from 5.0 pg/mL to 500 ng/mL, with the limit of detection (LOD) of 2.0 pg/mL, under optimal conditions. Moreover, the developed method was successfully applied to the rapid detection of IgE in human urine, indicating a great potentiality of this approach in clinical diagnosis and other biomedical applications. FAU - Lin, Xuexia AU - Lin X AUID- ORCID: 0000-0002-4761-6844 AD - Department of Chemical Engineering & Pharmaceutical Engineering, College of Chemical Engineering, Huaqiao University, Xiamen 361021, China. linxuexia@hqu.edu.cn. FAU - Yu, Caiyun AU - Yu C AD - Department of Chemical Engineering & Pharmaceutical Engineering, College of Chemical Engineering, Huaqiao University, Xiamen 361021, China. caiyunYu001@163.com. FAU - Lin, Honggui AU - Lin H AD - School of Marine Engineering, Jimei University, Xiamen 361021 China. linhongui36@163.com. FAU - Wang, Cui AU - Wang C AD - Applied and Environment Microbiology, Department of Biology, Georgie State University, Atlanta, GA 30303, USA. lorna.cui@hotmail.com. FAU - Su, Jianlong AU - Su J AD - Department of Chemical Engineering & Pharmaceutical Engineering, College of Chemical Engineering, Huaqiao University, Xiamen 361021, China. sujianlong_123@163.com. FAU - Cheng, Jie AU - Cheng J AD - Department of Chemical Engineering & Pharmaceutical Engineering, College of Chemical Engineering, Huaqiao University, Xiamen 361021, China. chengj@hqu.edu.cn. FAU - Kankala, Ranjith Kumar AU - Kankala RK AUID- ORCID: 0000-0003-4081-9179 AD - Department of Chemical Engineering & Pharmaceutical Engineering, College of Chemical Engineering, Huaqiao University, Xiamen 361021, China. ranjithkankala@hqu.edu.cn. FAU - Zhou, Shu-Feng AU - Zhou SF AUID- ORCID: 0000-0002-5542-6119 AD - Department of Chemical Engineering & Pharmaceutical Engineering, College of Chemical Engineering, Huaqiao University, Xiamen 361021, China. szhou@hqu.edu.cn. LA - eng GR - 21804045, 21275059 and 21575044/National Natural Science Foundation of China/ GR - 2018J05020, and 2016J01062/Natural Science Foundation of Fujian Province/ GR - 3502Z20183027, and 3502Z20183040/Natural Science Foundation of Xiamen City/ GR - ZQN-PY612/Promotion Program for Young and Middle-aged Teacher in Science and Technology Research of Huaqiao University/ PT - Journal Article DEP - 20190514 PL - Switzerland TA - Sensors (Basel) JT - Sensors (Basel, Switzerland) JID - 101204366 RN - 0 (Benzothiazoles) RN - 0 (DNA, Catalytic) RN - 0 (Sulfonic Acids) RN - 28752-68-3 (2,2'-azino-di-(3-ethylbenzothiazoline)-6-sulfonic acid) RN - 37341-29-0 (Immunoglobulin E) RN - BBX060AN9V (Hydrogen Peroxide) SB - IM MH - Benzothiazoles/chemistry MH - *Biosensing Techniques MH - *Colorimetry MH - DNA, Catalytic/chemistry MH - G-Quadruplexes MH - Humans MH - Hydrogen Peroxide/chemistry MH - Immunoglobulin E/chemistry/*isolation & purification MH - Limit of Detection MH - Nucleic Acid Amplification Techniques MH - Sulfonic Acids/chemistry PMC - PMC6567344 OTO - NOTNLM OT - DNAzyme OT - colorimetric competition detection OT - functional nucleic acids OT - immunoglobulin E COIS- The authors declare no conflict of interest. EDAT- 2019/05/17 06:00 MHDA- 2019/11/14 06:00 PMCR- 2019/05/01 CRDT- 2019/05/17 06:00 PHST- 2019/04/22 00:00 [received] PHST- 2019/05/10 00:00 [revised] PHST- 2019/05/11 00:00 [accepted] PHST- 2019/05/17 06:00 [entrez] PHST- 2019/05/17 06:00 [pubmed] PHST- 2019/11/14 06:00 [medline] PHST- 2019/05/01 00:00 [pmc-release] AID - s19102224 [pii] AID - sensors-19-02224 [pii] AID - 10.3390/s19102224 [doi] PST - epublish SO - Sensors (Basel). 2019 May 14;19(10):2224. doi: 10.3390/s19102224.